Check if a value is an object in JavaScript

Question

How do you check if a value is an object in JavaScript?

Answer 1

My God, too much confusion in other answers.

Short Answer

typeof anyVar == 'object' && anyVar instanceof Object && !(anyVar instanceof Array)

To test this simply run the following statements in chrome console.

Case 1.

var anyVar = {};
typeof anyVar == 'object' && anyVar instanceof Object && !(anyVar instanceof Array) // true

Case 2.

anyVar = [];
typeof anyVar == 'object' && anyVar instanceof Object && !(anyVar instanceof Array) // false

Case 3.

anyVar = null;
typeof anyVar == 'object' && anyVar instanceof Object && !(anyVar instanceof Array); // false

Explanation

Okay.Let's break it down

typeof anyVar == 'object' is returned true from three candidates - [], {} and null,

anyVar instanceof Object narrows down these candidates to two - [], {}

!(anyVar instanceof Array) narrows to only one - {}

Drum rolls please!

By this you may have already learnt how to check for Array in Javascript.